Something that many people are unaware of is that Mountain Dew is orange juice based. This bit of info is especially useful when mixing alcoholic drinks, as many recipes that call for orange juice can be made with Mountain Dew instead. New variations on old favorites!

Vodka + Orange Juice = Screwdriver
Vodka + Mountain Dew = Dewdriver

You'd be surprised at how good this sort of thing can taste. I used to hate Fuzzy Navels, for example.

Also, Mountain Dew contains a great deal of caffiene, which (like alcohol) is a diuretic. I have heard (from sources of limited repute) that dehydration somehow enhances alcohol's intoxicating effect. If so, well, hey then, even better.